EXT Ferro Arma MX Set

The EXT Ferro Arma MX Set is a complete high-performance suspension package built for riders who want maximum control, responsiveness, and chassis stability from their e-moto setup.

Combining the EXT Ferro dual-crown fork with the Arma MX rear shock, this race-level suspension system delivers exceptional front and rear balance, advanced damping control, and ultra-plush ride quality across aggressive terrain.

Purpose-built for lightweight electric dirt bikes, the Ferro Arma MX package is engineered to handle high-speed riding, hard impacts, technical terrain, and demanding suspension loads without compromise.

Key Features

EXT Arma MX Rear Shock

• 4-way adjustable damping system
• Low-Speed Compression (LSC)
• High-Speed Compression (HSC)
• Low-Speed Rebound (LSR)
• Hydraulic Bottom-Out Control (HBC)
• High-flow 29mm main piston
• 24mm valve piston
• Oversized 14mm shaft for increased side-load durability
• Ultra-low friction coating for improved responsiveness
• User-adjustable hydraulic bottom-out system
• Low reservoir pressure (55 PSI) for maximum sensitivity
• Progressive damping characteristics with strong mid-stroke support
• Custom-tuned hydraulic setup based on bike and rider configuration
• Lightweight spring included

EXT Ferro Front Fork

• Dual crown inverted MX fork design (USD)
• 36mm heat-treated hard chromed steel stanchions
• HS3 twin positive air system + self-balancing negative chamber
• Independent high/low-speed compression and rebound adjustment
• High-flow 3-way cartridge damping system
• External pressure release valves on both fork legs
• Twin hexagonal floating Ø20mm boost-compatible axle
• CGB continuously guided bushing system for increased stiffness
• Self-bleeding hydraulic cartridge design
• 205mm travel with 44mm offset
• Compatible with stock fender setups

Specifications

Arma MX Rear Shock

• 29mm high-flow piston
• 14mm oversized shaft
• Low-friction seal system
• Adjustable HBC bottom-out control
• Spring options:
• 400lb
• 450lb
• 500lb
• 550lb
• 600lb

Ferro Fork

• Travel: 205mm
• Offset: 44mm
• Weight: 4000g
• Brake Mount: 200mm post mount
• Axle: Ø20mm Boost compatible

Fitment

Compatible with many lightweight e-moto platforms including:

• Sur-Ron Light Bee X
• Talaria MX4
• E Ride Pro SS 2.0
• Ventus One
• 79 Bike Pro

Performance Benefits

The Ferro Arma MX package dramatically improves:

• Front and rear chassis balance
• High-speed stability and traction
• Bottom-out resistance on hard impacts
• Steering precision and front-end rigidity
• Suspension response consistency under aggressive riding
• Overall rider confidence and control

Built for riders looking for true motocross-level suspension performance from their e-moto platform.

Important Notes

• Boost rotor spacer may be required depending on wheel setup
• Professional installation and tuning strongly recommended
• Head tube reinforcement clamp recommended for older Sur-Ron models
• Spring rates should be selected based on rider weight and riding style
• Includes bike-specific mounting hardware for installation
• Some configurations and spring options may be built to order or require extended processing time (pre-order items may ship with delayed timelines)